Internal triple-band antenna

a triple-band antenna and antenna technology, applied in the direction of resonant antennas, substantially flat resonant elements, radiating element structural forms, etc., can solve the problems of increasing the manufacture cost, affecting the quality of the antenna, so as to reduce the cost of manufacture

Inactive Publication Date: 2006-02-07
INFORMATION & COMM UNIV EDUCATIONAL FOUND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007]It is, therefore, an object of the present invention to provide an internal antenna of a single body that can implement a broadband characteristic for covering, e.g., a PCS, an IMT-2000 and a Bluetooth band in a mobile handset and can be fed via a microstrip line thereby requiring no additional element for feeding in a mobile handset to reduce a cost of manufacture.

Problems solved by technology

However, since extended outward, the external antennas are easily damaged by an external force to result in a characteristic deterioration.
However, a broadband characteristic for covering, e.g., a PCS, an IMT-2000 and a Bluetooth band is difficult to achieve by using the microstrip patch antenna or the planar inverted F antenna of a suitably small size for a mobile handset.
Further, the planar inverted F antenna requires an additional element such as a shorting pin in order to be fed in a mobile handset, which raises its manufacture cost.

Method used

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Examples

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Embodiment Construction

[0021]Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[0022]FIG. 1 shows a perspective view of a printed circuit board (PCB) 20 for use in a mobile handset, on which an internal triple-band antenna 10 is disposed, in accordance with a preferred embodiment of the present invention.

[0023]Referring to FIG. 1, the internal triple-band antenna 10, fed via a microstrip line 25 on the printed circuit board 20, is a single conductive plate including a common portion 30, a first meander-shaped portion 35 and a second meander-shaped portion 40. Among the common portion 30, the first meander-shaped portion 35 and the second meander-shaped portion 40 is located a T-shaped slot. The first and the second meander-shaped portion 35 and 40 have one or more linear slots, respectively, and the common portion 30 may also have a linear slot.

[0024]The first meander-shaped portion 35 together with the common portion 30 fo...

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Abstract

An internal antenna for use in a mobile handset is formed of a single conductive plate. The internal antenna includes a first meander-shaped portion having one or more slots, including a first bent portion bent downward at a side edge of the first meander-shaped portion; a second meander-shaped portion having one or more slots, including a second bent portion bent downward at an end of the second meander-shaped portion; and a common portion physically connected to the first and the second meander-shaped portion. The first meander-shaped portion together with the common portion forms a first radiating element and the second meander-shaped portion together with the common portion forms a second radiating element, the first radiating element having a first resonant frequency and the second radiating element having a second resonant frequency.

Description

RELATED APPLICATION[0001]This application claims priority of Republic of Korea patent Application No. 10-2002-0048177 filed on Jul. 15, 2003.[0002]1. Field of the Invention[0003]The present invention relates to an internal antenna; and, more particularly, to an internal triple-band antenna for use in a mobile handset.[0004]2. Background of the Invention[0005]As is well known, an antenna is an essential part of a mobile handset. In a mobile handset, external antennas such as a helical antenna and a monopole antenna have been widely used. The monopole antenna, having an omni-directional radiation pattern and achieving a high gain, is widely used as a retractable antenna in a mobile handset. However, since extended outward, the external antennas are easily damaged by an external force to result in a characteristic deterioration.[0006]To overcome the above-mentioned drawback of the external antennas, internal antennas such as a microstrip patch antenna and a planar inverted F antenna ha...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): H01Q1/24H01Q1/38H01Q5/00H01Q5/371H01Q9/04H01Q21/30
CPCH01Q1/243H01Q9/0407H01Q5/371H01Q21/30H01Q9/0442H01Q5/00H01Q9/065
Inventor SIM, DONG-UKPARK, SEONG-OOK
Owner INFORMATION & COMM UNIV EDUCATIONAL FOUND
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